Heating system for incubators.



APPLICATION FILED DEC. 7

c v N n c N H M w c F m E T E P m E a D N E H r JOHN V. LINDSEY, OFFAIRFIELD, NEBRASKA.

HEATING SYSTEM FOR INCUBATORS- Specification of Letters Patent.

Patented March 26, 1907.

Application filed December 7,1905. Serial No. 290,772.

To all whom it may concern.-

Be it known that I, JOHN V. LINDSEY, a citizen of the United States,residing at Fairfield, in the county of Clay and State of Nebraska, haveinvented certain new and useful Improvements in Heating Systems forIncubators; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which .it appertains to make and use the same.

This invention relates to improvements in incubators.

The object of the invention is to provide an incubator in which acontinuous circulation of hot water and steam will be automatically keptup, means being provided to automatically regulate the heat in theincubator.

A further object is to provide a novel arrangement of the water-heatingtank, whereby the heat of the lamp will be applied to both the inner andouter sides of the tank.

With these and other objects in view the invention consists of certainnovel features of construction, combination, and arrangement of parts,as will be more fully described, and particularly pointed out in theappended claims.

In the accompanying drawings, Figure 1 is a vertical longitudinalsectional View of an incubator, showing the application of-the inventionthereto. tional view through the same, showingthe heating system in topplan view with the damper mechanism removed. Fig. 3 is a detailhorizontal sectional view through the heating-tank on the line 3 3 ofFig. 1.

Referring more particularly to the drawings, 1 denotes an incubator,which may be of the usual or any desired construction. Near the top ofthe incubator is arranged a heating system whichconsists of a tank 2,suitably supported on the outer side of one end of the incubator, saidtank having arranged on its lower end a jacket 2, which extends aroundthree sides and below the bottom of the tank and communicates with acentral vertically-disposed heat-tube 3, arranged in the tank and intowhich the upper end of the heating-lamp chimney is inserted. The up erend of the tank is closed by a cover t ough which the tube 3 projects,and in said cover is arranged a filling-opening normally closed by aplug 4.

Connected with the upper end of the tank Fig. 2 is a horizontal secthereturn water therefrom will be quickly mixed with the hot water in thetank, and thereby reheated.

On. the return pipe or tube 6, near the downwardly-curved outer end ofthe same, is arranged a steam-dome 9, with which is connected asteam-discharge pipe 10, which curves upwardly and projects through theend of the incubator, thus preventing an excess of steam-pressure in theheating-tank 2.

In order to regulate the heat within the in cubator, a damper-plate 12is provided, said plate being adapted to normally rest on top of thetank and to close the heat-tube 3. The plate 12 is connected by a link13 to a rod or lever 14, which is pivotaly mounted on the top of theincubator, and at a point intermediate the ends of said rod is connecteda link 15, which extends down into the incubator and is connected to athermostat 16,

. arranged in suitable position in the incubator,

whereby when the heat therein reaches a certain point the thermostatwill expand and cause the lever 14 to raise the plate 12, thus allowinthe heat of the lamp to escape from the tanl i, as will be understood.When the plate 12 is closed, the heat from the lamp passes out of theheat-tube at the bottom and between the walls of the jacket 2, therebyheating both the inside and outside of the tank. The thermostat 16comprises two expansible members secured upon opposite sides of a tiemember, the lower expansible member being connected to the casing of theincubator and the upper expansible member being connected to the link15. Any other suitable form of thermostat maybe employed. From the foreoing description, taken in connection with the accompanying drawings,the construction and operation of the invention will be readilyunderstood without re quiring a more extended explanation.

Various changes in the form, proportion, and the minor details ofconstruction maybe resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined by theappended claims.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an incubator-heating system, the combination with a heating-tankcomprising a heating-tube and an outer heat-conducting sleeve, ofhot-water-circulating pipes communicating with said tank and extendinginto the incubator, a return-pipe extending into the tank and havingtherein diverging branches in communication therewith,obliquely-disposed pipes, each communicating at one end with one of thecirculating-pipes and at the other end with the return-pipe, asteam-dome on the return-pipe, a steam-discharge pipe leading from saiddome to pre vent excess steam-pressure in said pipes, a damper arrangedon said heating-tank to retain the heat therein and a thermostaticdamper-operating mechanism to automatically raise said damper andthereby regulate the heat in said tank, substantially as described.

2. in an incubator -heating system, the comb1nat1on W1th a heating-tankcomprising a centrally-disposed heating-tube and a heatconducting sleeveor jacket arranged around the same, of hot-water-circulatin pipescommunicating with said tank an extending into the incubator, areturn-pipe extending into the 'tank and having therein divergingbranches in communication therewith, obliquely-disposed pipes eachcommunicating at one end with one of the circulating-pipes and at theother end with the return-pipe, a steam-dome on the return-pipe, asteam-discharge pipe leading from the dome, a damperplate disposed abovesaid tank, a lever connected to said damper-plate, and a thermostaticheat-regulating device in the incubator and connected to said lever,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN V. LINDSEY.

Witnesses:

W. E. RIGGS, W. L. SHEETS.

